Fe content in Nitric Passivation solution
Fe content in Nitric Passivation solution
(OP)
Is there a spec somewhere or a good rule of thumb on how much iron (in ppm) is ok in a 45% Nitric acid passivating bath, before the tank should be purged? I am trying to write an internal company spec and this question has come up.





RE: Fe content in Nitric Passivation solution
I think that the tank looks very bad long before it causes process issues
I am out of the office so I can't check out spec.
I only recall the pickle numbers.
= = = = = = = = = = = = = = = = = = = =
Plymouth Tube
RE: Fe content in Nitric Passivation solution
RE: Fe content in Nitric Passivation solution
Steve Jones
Materials & Corrosion Engineer
http://www.linkedin.com/pub/8/83b/b04
RE: Fe content in Nitric Passivation solution
So people rely on process control. If we got good results with 10 min bath time then we use 15 or 20 in production to assure passivation.
= = = = = = = = = = = = = = = = = = = =
Plymouth Tube
RE: Fe content in Nitric Passivation solution
Were you able to find anything about iron levels?